/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include "U2Script.h"

#include <QFileInfo>

#include <U2Core/AppContext.h>
#include <U2Core/Task.h>
#include <U2Core/U2SafePoints.h>

#include "SchemeWrapper.h"
#include "UgeneContextWrapper.h"

static U2::UgeneContextWrapper *GLOBAL_CONTEXT = NULL;

U2ErrorType processTask(U2::Task *task) {
    if (NULL == GLOBAL_CONTEXT) {    // when script interface was used from inside UGENE
        // now it's being used in unit tests
        CHECK(U2::UgeneContextWrapper::isAppContextInitialized(), U2_INVALID_CALL);
        U2::TaskScheduler *scheduler = U2::AppContext::getTaskScheduler();
        CHECK(NULL != scheduler, U2_INVALID_CALL);
        scheduler->registerTopLevelTask(task);
    } else {
        GLOBAL_CONTEXT->processTask(task);
    }
    return U2_OK;
}

extern "C" {

U2SCRIPT_EXPORT U2ErrorType initContext(const wchar_t *_workingDirectoryPath) {
    QString workingDirectoryPath = QString::fromWCharArray(_workingDirectoryPath);
    QFileInfo info(workingDirectoryPath);
    if (NULL == workingDirectoryPath || !info.isDir() || !info.exists()) {
        return U2_INVALID_PATH;
    }
    if (NULL == GLOBAL_CONTEXT) {
        try {
            GLOBAL_CONTEXT = new U2::UgeneContextWrapper(workingDirectoryPath);
        } catch (const std::bad_alloc &) {
            delete GLOBAL_CONTEXT;
            return U2_NOT_ENOUGH_MEMORY;
        }
    } else {
        return U2_INVALID_CALL;
    }
    return U2_OK;
}

U2SCRIPT_EXPORT U2ErrorType releaseContext() {
    if (NULL != GLOBAL_CONTEXT) {
        delete GLOBAL_CONTEXT;
        GLOBAL_CONTEXT = NULL;
    } else {
        return U2_INVALID_CALL;
    }
    return U2_OK;
}
};
